Blackberry Q10 Unlocked Cellphone, 16GB, White 2G: GSM 850 / 900 / 1800 / 1900, 3G: HSDPA 850 / 900 / 1900 / 2100, 4G: LTE 800 / 900 / 1800 / 2600 3.1" Super AMOLED Capacitive Multi-Touchscreen BlackBerry 10 upgradable to 10.2.1, Dual-Core 1.5 GHz Krait Processor, Chipset: Snapdragon S4, Adreno 225 Graphics 8 Megapixel Camera (3264 x 2448 pixels) ) w/ Autofocus, LED Flash + Front-Facing 2 Megapixel Camera, 720p + Video 1080p@30fps Internal Memory: 16GB, 2GB RAM + microSD Slot Expandable up to 64GB Unlocked cell phones are compatible with GSM carriers like AT&T and T-Mobile as well as with GSM SIM cards (e.g. H20, Straight Talk, and select prepaid carriers). Unlocked cell phones will not work with CDMA Carriers like Sprint, Verizon, Boost or Virgin.